Pyrazine Cyclisation
![A–C The direct C-H arylation of pyrrolo [1,2-a] pyrazine derivatives ...](https://www.researchgate.net/publication/354660067/figure/fig14/AS:1069253293797397@1631941259333/A-C-The-direct-C-H-arylation-of-pyrrolo-1-2-a-pyrazine-derivatives.png "Pyrazine Cyclisation")
![A The synthesis of new 1-phosphonylated pyrrolo [1,2-a] pyrazine ...](https://www.researchgate.net/publication/354660067/figure/fig19/AS:1069253293789257@1631941259730/A-The-synthesis-of-new-1-phosphonylated-pyrrolo-1-2-a-pyrazine-derivatives-B-One-pot.png "Pyrazine Cyclisation")
![Conversion of oxadiazolo[3,4-b]pyrazines to imidazo[4,5-b]pyrazines via ...](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/651a/10966457/9f205edd65b1/nihms-1977462-f0003.jpg "Pyrazine Cyclisation")
![Metal‐Free Oxidative [5+1] Cyclization of 1,5‐Enynes for the Synthesis ...](https://onlinelibrary.wiley.com/cms/asset/b04d1c75-8981-4c6f-bde7-96e941a35592/adsc202000756-toc-0001-m.jpg "Pyrazine Cyclisation")
![Scalable Synthesis of 6-Chloro-1H-pyrazolo[3,4-b]pyrazine via a ...](https://pubs.acs.org/cms/10.1021/acs.oprd.4c00047/asset/images/acs.oprd.4c00047.social.jpeg_v03 "Pyrazine Cyclisation")
![(PDF) Synthesis and Antimicrobial Activity of Pyrazolo[4,5-e] Pyrimido ...](https://figures.academia-assets.com/110132244/figure_001.jpg "Pyrazine Cyclisation")
![Supposed multistep 6-amino-9H-[¹⁵N5]-purine (1) cyclization from ...](https://mavink.com/images/loadingwhitetransparent.gif "Pyrazine Cyclisation")
![Synthesis of pyrazines 2. [a] = mixture of inseperable compounds ...](https://www.researchgate.net/publication/321661248/figure/fig3/AS:11431281189955544@1695215759606/Synthesis-of-pyrazines-2-a-mixture-of-inseperable-compounds_Q640.jpg "Pyrazine Cyclisation")
![Synthesis and Antibacterial Activity of Novel Triazolo[4,3-a]pyrazine ...](https://pub.mdpi-res.com/molecules/molecules-28-07876/article_deploy/html/images/molecules-28-07876-sch001.png?1701400792 "Pyrazine Cyclisation")
![Access to novel imidazo[1,5-a]pyrazine scaffolds by the combined use of ...](https://pubs.rsc.org/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4OB00676C&imageInfo.ImageIdentifier.Year=2014 "Pyrazine Cyclisation")
![Divergent Assembly of Functionalized Pyrazolo[1,5‐a]pyridine ...](https://onlinelibrary.wiley.com/cms/asset/9a2c0a5d-c833-4b17-bded-a7d3fdb89ce9/cjoc202400741-toc-0001-m.jpg "Pyrazine Cyclisation")
![Conversion of oxadiazolo[3,4-b]pyrazines to imidazo[4,5-b]pyrazines via ...](https://xpic.x-mol.com/20220801/10.1016_j.bmcl.2022.128912.jpg "Pyrazine Cyclisation")
![Oxidative [3+2]Cycloaddition of Alkynylphosphonates with Heterocyclic N ...](https://www.mdpi.com/molecules/molecules-27-07913/article_deploy/html/images/molecules-27-07913-sch005.png "Pyrazine Cyclisation")
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